BookFinder.com is a vertical searchwebsite that helps readers buy books online. The site's meta-search engine scans the inventories of over 100,000 booksellers located around the world. Among the books from sellers whose inventories are indexed, users can find the lowest price for a book of their choice from over 150 million volumes available for sale, and purchase titles directly from the bookseller, without a markup.[2][3] The search engine is focused primarily on Dutch, English, French, German, Italian, and Spanish language titles.

BookFinder.com was founded in 1997 by Anirvan Chatterjee, then a student at the University of California, Berkeley; it was one of the earliest vertical search engines for books online.[4] Originally known as MX BookFinder,[4] it was relaunched as BookFinder.com in 1998 and established as a standalone company based in Berkeley, California in 1999.